2.2 Layers - Differentiation & Core

What are the 2 sources of Earth's interior energy?

(Select the 2 correct options)

• Energy from collisions when the early Earth accreted material.

• 
  Energy released from the radioactive decay of Uranium and other radioactive elements inside the Earth.

• Energy sent to the Earth from Solar Wind.

• Energy generated from seismic waves that travel through the Earth.

• Energy from nuclear fusion due to high temperatures in the Earth's core.

What was the most fun thing you did during Thanksgiving??

What occurred when the Earth underwent "differentiation"?

• Because the Earth was in a molten state, the denser materials were able to sink to the core while lighter material rose to the surface.

• 
  The Earth transformed from a planetesimal to a protoplanet. This is a process of becoming different.

• The Earth began to undergo nuclear fusion at its core due to the immense pressures.

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Scientist will classify the Earth into layers based on different properties or characteristics.

What is a "CHEMICAL PROPERTY"?

• 
  This refers to the composition or the various elements and rock types of the Earth.

• This refers to the density of Earth material.

• This refers to the state of matter of Earth material.

• This refers to the Earth material's ability to flow or to deform

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2 different types of classification or layers of the Earth are shown in the diagram.

Which shows the CHEMICAL layers of the Earth?

• Diagram on the left (crust, mantle, core)

• Diagram on the right (lithosphere, asthenosphere, mesophere, outer core, inner core)

How many diapers does the Despain household go through each year?

• 750

• 1,500

• 3,000

• 300

What is most significant about the OUTER CORE being liquid iron & nickel?

• 
  Since it is liquid, it can flow and create convection currents which generates the Earth's magnetic field.

• Since it is liquid, it can flow upward into the mantle and cause mantle convection.

• Since it is liquid, it can transfer heat energy towards the inner core.

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How do we know the layers of the interior of the Earth?

• By using special satellite imagery that can see inside the Earth.

• By drilling down into the lower layers and collecting samples.

• By studying seismic waves that are generated by earthquakes.

• By analyzing rock samples from volcanoes that erupt from the core.

What is true concerning Seismic Waves?

• They are waves that carry heat from the core to the crust. They are generated within the Earth's core.

• They are vibrations produced by an earthquake within the lithosphere. Its energy travels through the material within the Earth.

• They are waves that only travel along the surface of the Earth which is why they destroy buildings.

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Which of the following statements best describes the difference between primary (P) and secondary (S) seismic waves?

• Secondary waves are faster and can travel through gases, while primary waves can only travel through solids.

• Primary waves are slower and move in a side-to-side motion, while secondary waves are faster and compress material as they pass through.

• Secondary waves travel faster and can move through both solids and liquids, while primary waves are slower and only travel through solids

• Primary waves travel faster and can move through both solids and liquids, while secondary waves are slower and only travel through solids.

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